Phosphorus-modified phenolic resin and preparation method thereof
A technology of phenolic resin and phosphorus modification, applied in the field of phosphorus-modified phenolic resin and its preparation, to achieve the effects of good space size, optimized production conditions and excellent coating performance
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[0022] Table 1, table 2, table 3, table 4 are the reaction raw material components and reaction conditions in embodiment 1~embodiment 20, wherein the phenol described in embodiment 1~embodiment 20 is p-tertoctylphenol, A mixed phenol of nonylphenol and bisphenol A.
[0023] In conjunction with the reaction raw material components and reaction conditions that table 1, table 2, table 3, table 4 provide, prepare according to the following preparation steps:
[0024] A. Take phenol, formaldehyde and water and add them into a four-necked flask and mix them evenly, then add a catalyst and mix them evenly, put the four-necked flask into an electric heating mantle and heat for condensation reaction to obtain a phenolic aldehyde condensate, release it after cooling down, and separate residual moisture;
[0025] B. Add the phenolic condensate obtained in step A back into the four-necked bottle, add monohydric alcohol and mix evenly, then add aluminum oxide and sulfuric acid as a cataly...
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